A grid layout can also expose custom settings - such as data-attributes or styling options - on each cell or row. This allows editors to use a friendly UI to add configuration values to grid elements. When custom settings and styles are applied, they will by default be included in the grid html as either html attributes or inline styles.
These settings and styles must be configured by developers when setting up the grid layout data type.
To add a setting, click the edit settings link. This will expand a dialog showing you the raw configuration data. This data is in the JSON format and will only save if it's valid JSON.
The settings data could look like this, with an object for each setting:
The different values are:
label : Field name displayed in the content editor UI
description : Descriptive text displayed in the content editor UI to guide the user
key : The key the entered setting value will be stored under.
view : The editor used to enter a setting value with.
prevalues : For views that need predefined values, e.g. the radiobuttonlist view.
modifier (optional) : A string formatter to modify the output of the editor to prepend or append extra values.
applyTo (optional) : States whether the setting can be used on a cell or a row. If either not present or empty, the setting will be shown both on Rows and Cells.
label and description are straight-forward.
key defines the alias the configuration is stored under and by default the alias of the attribute will also be the attribute on the rendered html element. In the example above any value entered in this settings editor will be rendered in the grid html as:
By changing the key of the setting you can modify the <div> element's attributes like class, title, id or custom data-* attributes.
view the view defines the editor used to enter a value. By default Umbraco comes with a collection of prevalue editors:
textstring
textarea
radiobuttonlist
mediapicker
imagepicker
boolean
treepicker
treesource
number
multivalues
Alternatively you can also pass in a path to a custom view like "/App_Plugins/grid/editors/view.html"
prevalues is for views that need predefined values, e.g. the radiobuttonlist view. Prevalues are defined as strings in an array:
and will translate in to three different options where each string will become a radiobutton. The strings represent the value of the options.
Prevalues can also be defined as an object of label/value allowing to have a displayed label instead of showing the actual underlying value. You can even mix and match these and use both label/value prevalues and string prevalues in the same configuration:
modifier is a basic way to prepend, append or wrap the value from the editor in a string. This is especially useful when working with custom styles which often requires additional values to function. For instance if you want to set a background image you can get an image path from the image picker view. But in order for it to work with css it has to be wrapped in url(). In that case you set the modifier to url({0}) which means that {0} is replaced with the editor value.
applyTo defines what this setting can be applied to. It should be either row or cell as a string.
A JSON object can also be used if you need a more specific configuration. A JSON configuration could look like this:
This would ensure the setting can only be used on rows named Article or Headline, or on cells sized: 4, 8 or 6. If it should only apply to cells you can remove the row property. If it should apply to all rows you can specify it by having the row property with null or an empty string as value.
There are many ways to combine these, here are some samples:
You can add multiple settings and styles configurations on a data type. This is done by creating a new setting or style object. Remember to separate the objects with a comma.
It is possible to use settings and styles to add full-width background-images, background-colors and so forth. Make sure the surrounding section is full-width (12 columns by default) and the rows inside it will automatically become full-width.